You are able to access your simulation's material properties using Ansys Fluent's web interface.

 Setup → Materials

From here, you can create new or view and make changes to the fluid and solid (and mixture, if applicable) materials available in your session, such as the material's density, specific heat, thermal conductivity, molecular weight, and so on. You can even access other material databases as well. The available material settings are similar to those found in the standard Fluent solver. For more detailed information about creating new and editing existing materials, see Create/Edit Materials Dialog Box.